<!--/**
* 添加商品界面*
*
* @author LWG
* @date 2022/9/7 15:54
* @since 1.0.0
*/-->

<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 提示 -->
      <el-alert title="添加商品信息" type="info" center show-icon :closable="false"></el-alert>
      <!-- 步骤 -->
      <el-steps :space="200" :active="Number(activeIndex)" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>
      <!-- tab栏区域 -->
      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-position="top">
        <el-tabs v-model="activeIndex" tab-position="left" :before-leave="beforeTagLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_name">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_name">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader v-model="addForm.goods_cat" :options="cateList" 
                :props="cateProps"
                expand-trigger="hover"
                @change="handleChange" change-on-select clearable>
              </el-cascader>
            </el-form-item>
            
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染的Item项 -->
            <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <!-- 复选框 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox border :label="cv" v-for="(cv,i) in item.attr_vals" :key="i"></el-checkbox id="goods-params">
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action为图片要上传的地址 -->
            <el-upload
              :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove"
              list-type="picture" :headers="headersObj" :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器 -->
            <quill-editor v-model="addForm.goods_introduce"></quill-editor>
            <el-button type="primary" class="btnAdd" @click="add">主要按钮</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 预览对话框 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewVisible"
      width="50%">
      <img :src="previewPath" class="previewImg">
    </el-dialog>
  </div>
</template>

<script>
  import _ from 'lodash';

  export default {
    name:'Add',
    data(){
      return{
        // 步骤条的当前索引
        activeIndex: 0,
        // 表单
        addForm: {
          goods_name: '',
          goods_price: 0,
          goods_weight: 0,
          goods_number: 0,
          // 商品所属的分类数组
          goods_cat: [],
          // 图片的数组
          pics:[],
          // 商品详情描述
          goods_introduce: '',
          attrs: []
        },
        // 表单的验证规则对象
        addFormRules: {
          goods_name: [
            {required: true, message: '请输入商品名称', trigger:'blur'}
          ],
          goods_price: [
            {required: true, message: '请输入商品价格', trigger:'blur'}
          ],
          goods_weight: [
            {required: true, message: '请输入商品重量', trigger:'blur'}
          ],
          goods_number: [
            {required: true, message: '请输入商品数量', trigger: 'blur'}
          ],
          goods_cat: [
            {required: true, message: '请选择商品分类', trigger: 'blur'}
          ]
        },
        // 商品数据列表
        cateList: [],
        // 选择框中要渲染的数据
        cateProps: {
          label: 'cat_name',  //要展示的内容
          value: 'cat_id',    //选中的为内容id
          children: 'children'
        },
        // 动态参数列表数据
        manyTableData: [],
        // 静态属性列表数据
        onlyTableData: [],
        // 图片上传的URL地址
        uploadURL:'http://127.0.0.1:8888/api/private/v1/upload',
        // 图片的请求头
        headersObj:{
          Authorization: window.sessionStorage.getItem('token')
        },
        // 图片预览对话框是否显示
        previewVisible: false,
        // 预览图片的路径
        previewPath:''
      }
    },
    created(){
      this.getCateList();
    },
    methods:{
      async getCateList(){
        const {data: res} = await this.$http.get('categories');
        if(res.meta.status !== 200) return this.$message.error(res.meta.msg);
        this.cateList = res.data;
      },
      // 级联选择器发生变化
      handleChange(){
        if(this.addForm.goods_cat.length !== 3){
          return this.addForm.goods_cat = [];
        }
        console.log(this.addForm.goods_cat);
      },
      // 离开tab时触发
      beforeTagLeave(newTab,oldTab) {
        if(oldTab === '0' && this.addForm.goods_cat.length !== 3){
          this.$message.error('请选择参数列表');
          return false;
        }
      },
      // tab栏被点击时触发
      async tabClicked(){
        if(this.activeIndex === '1'){
          const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
            params: { sel: 'many'}
          });
          if(res.meta.status !== 200) return this.$message.error(res.meta.msg);
          res.data.forEach(element => {
            element.attr_vals = element.attr_vals.length === 0 ? [] : element.attr_vals.split(' ');
          });
          this.manyTableData = res.data;
          console.log(res.data);
        }else if(this.activeIndex === '2'){
          const {data: res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
            params:{ sel: 'only'}
          });
          if(res.meta.status !== 200)return this.$message.error(res.meta.msg);
          this.onlyTableData = res.data;
        }
      },
      // 图片预览事件
      handlePreview(file){
        const previewPath = file.response.data.url;
        this.previewPath = previewPath;
        this.previewVisible = true;
        console.log(previewPath);
      },
      // 图片移除事件
      handleRemove(file){
        const filePath = file.response.data.tmp_path;   /* 获取要删除图片的路径(file为当前删除的图片对象) */
        const index = this.addForm.pics.findIndex(x => x.pic === filePath);   /* 筛选出要删除图片在数组中的索引 */
        this.addForm.pics.splice(index,1);   /* 利用splice方法把数组中的图片删除掉 */
      },
      // 监听图片上传成功的事件
      handleSuccess(response){
        const picInfo = {pic: response.data.tmp_path}
        this.addForm.pics.push(picInfo);
      },
      // 提交商品信息
      add(){
        this.$refs.addFormRef.validate(async valid => {
          if (!valid) {
            return this.$message.error('请填写必要的表单项！')
          }
          // 执行添加的业务逻辑
          // lodash   cloneDeep(obj)
          const form = _.cloneDeep(this.addForm)
          form.goods_cat = form.goods_cat.join(',')
          // 处理动态参数
          this.manyTableData.forEach(item => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_value: item.attr_vals.join(' ')
            }
            this.addForm.attrs.push(newInfo)
          })
          // 处理静态属性
          this.onlyTableData.forEach(item => {
            const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
            this.addForm.attrs.push(newInfo)
          })
          form.attrs = this.addForm.attrs
          console.log(form);

          // 发起请求添加商品
          // 商品的名称，必须是唯一的
          const { data: res } = await this.$http.post('goods', form)

          if (res.meta.status !== 201) {
            return this.$message.error('添加商品失败！')
          }

          this.$message.success('添加商品成功！')
          this.$router.push('/goods')
        })
      }

    },
    computed:{
      // 计算分类二级id
      cateId(){
        if(this.addForm.goods_cat.length === 3){
          return this.addForm.goods_cat[2]
        }
        return null;
      }
    }
  }
</script>

<style lang="less" scoped>
  .el-checkbox-group > .el-checkbox {
    margin: 0 10px 0 0 !important;
  }
  .previewImg{
    width: 100%;
  }
  .btnAdd{
    margin-top: 15px;
  }
</style>